Pete Here,
as someone said earlier be sure your 110 breaker is on.
Any electrical problem is easier if you start at the inputs and go to the
outputs you will need a 110 tester of somekind ac dc vom cheap at any auto
parts store. You will also need a 12v dc tester thus the ac dc vom.
Next go to the input of your univolt make sure you have 110vac at the Black
and white wires ie" coming from you breaker. if you have it then go to your
outputs of your univolt they go to the battery see if you have 12v dc. be
sure your battery is disconected that way you only read what your univolt
is puting out.
If when you hook up you battery the voltage drops suddenly you may have a
bad battery.
Hope this is of some help!!!
Pete Highlands
WBCCI 6385
n3rlj
1968 TW 24T